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3. INSTALLATION
3.1 Pre-Installation
DO NOT CONNECT THE UPS TO A LINE CONDITIONER, ISOLATION
TRANSFORMER OR ANY OTHER SIMILAR TYPE OF DEVICE. DAMAGE
TO THE UPS AND THE LINE CONDITIONING EQUIPMENT CAN OCCUR.
Site Preparation
The UPS should be installed upright in a well-ventilated, dust free
environment. The weight of the UPS, especially if it has an optional battery
pack, is quite heavy (see specifications). Do not place the unit on any surface
unable to fully support its weight.
Utility Circuit Breaker
The UPS should be installed on a dedicated circuit with a properly sized
circuit breaker. Breaker size can be determined by adding 15% to the
maximum input current of the unit (see specifications). For example, the CFR
600 draws 4.8 Amps of current. By adding 15%, the number becomes 5.5
Amps. In this case, a standard 15 Amp circuit breaker is suitable for use.
Grounding
Since the CFR UPS bonds output neutral to ground (qualifying it as a
"separately-derived power source"), proper grounding is critical. Many older
facilities may have an electrical system that is incapable of supporting this
type of grounding requirement. To ensure optimum performance from your
UPS, always install a hardwired ground. A qualified electrician should also
inspect the existing wiring in the building prior to installation to verify proper
grounding.
Standby Generators
The CFR is equipped with a frequency sense circuit, along with a
constant slew frequency synchronization circuit, to optimize operation with
most standby generators. Prior to installation, compare the output voltage of
the generator to the voltage requirements of the UPS (see CFR nameplate
label). If the UPS requires 240 VAC input and the generator produces only
208 VAC, it will cause the UPS to run continuously off of battery power. This
would discharge the UPS batteries and cause the output load to fail.
Alpha Technologies recommends using a generator equipped with an
electronic speed and voltage control. If a generator equipped with a mechani-
cal governor "speed control" is used, this could also cause the UPS to run
continuously in LINE FAILURE mode due to the unstable frequency of the
generator.
The generator should also produce less than 10% voltage THD.
Generators with a higher THD rating may cause the CFR UPS to switch to
LINE FAILURE mode, and switch to battery operation, as the generator output
would be sensed as a noisy utility.
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Troubleshooting
